Almost nine months after we first heard about it, the Mary Poppins sequel is officially a go. It's aptly titled Mary Poppins Returns, and it's hitting theaters on Dec. 21, 2018. Golden Globe winner Emily Blunt and Hamilton creator/star/general musical mastermind and freestyle rap extraordinaire Lin-Manuel Miranda have been rumored as the stars; today they're confirmed. Blunt is Poppins, while Miranda is a new character, a street lamplighter called Jack.

The film is set two decades after the 1964 original, sliding the setting forward to 1930s London. Here's what Disney's press release promises:

"Drawing from the wealth of material in P.L. Travers’ seven additional novels, the story will take place in Depression-era London (when the books were originally written) and follows a now-grown Jane and Michael Banks, who, along with Michael’s three children, are visited by the enigmatic Mary Poppins following a personal loss. Through her unique magical skills, and with the aid of her friend Jack, she helps the family rediscover the joy and wonder missing in their lives."

As previously reported, Rob Marshall, who directed Blunt in Disney's Into the Woods in 2014, is at the helm. (He also did Chicago and Pirates of the Caribbean: On Stranger Tides.) The script's by Life of Pi and Finding Neverland screenwriter David Magee.